通过微撞击流反应器（MISR）结合加盐晶种法制备多级孔ZSM-5分子筛，探索硅胶流量、含晶种的铝源混合液流量、循环时间以及晶化时间对多级孔ZSM-5分子筛粒径大小和孔径结构的影响规律。并与传统方法合成的多级孔ZSM-5分子筛作为催化剂应用于甲苯与氯化苄烷基化反应中，从催化活性、选择性以及反应温度3方面进行对比。结果表明，利用微撞击流强化混合过程制备多级孔ZSM-5分子筛的最佳操作条件为：硅胶流量为40 mL/min，含晶种的铝源混合液流量为20 L/h，循环时间为5 min，晶化时间为6 h。在甲苯与氯化苄烷基化反应中对比发现，氯化苄的转化率都随着温度的增大而增大，但微撞击流反应器合成的多级孔ZSM-5分子筛的催化活性、选择性优于使用磁力搅拌器合成的多级孔ZSM-5分子筛。

Hierarchical pore ZSM-5 molecular sieves are prepared by salt-added crystal seed induced route in a micro-impinging stream reactor (MISR).The effects of colloidal silica flow rate,flow rate of crystal seed-containing natrium aluminate mixture,cycle time and crystallization time on the particle and pore sizes of ZSM-5 molecular sieves are investigated.The prepared ZSM-5 molecular sieves are compared with its same kind catalysts synthesized by traditional method in the aspects of catalytic activity,selectivity and reaction temperature through their applications in the benzylation of toluene by benzyl chloride.The optimal operating parameters for synthesis of hierarchical pore ZSM-5 molecular sieves by micro-impinging stream strengthened mixing process are obtained as follows:40 mL·min^-1 for the flow rate of colloidal silica,20 L·h^-1 for the flow rate of crystal seed-containing natrium aluminate mixture,5 min for the cycle time and 6 h for the time of crystallization.The experimental results of the benzylation of toluene by benzyl chloride show that the conversion of benzyl chloride increases with temperature,and the catalytic activity and selectivity of the hierarchical pore ZSM-5 molecular sieves prepared by MISR is better than that of the ones prepared by traditional method.

武晓利(1990-),女,硕士生,研究方向为超重力过程强化技术,wxlzbdx@163.com。